Python package to read .7z archives?

[Hallvard B Furuseth]

Giampaolo Rodolà <g.rodola at gmail.com> writes:
> 2010/8/4 Hallvard B Furuseth <h.b.furuseth at usit.uio.no>:
>> Is there an equivalent of zipfile.py for .7z archives?
>> I have one which extracts an archive member by running 7z e -so,
>> but that's a *slow* way to read one file at a time.
>>
>> Google found me some python interfaces to lzma, but apparently they
>> only handle single compressed files, not .7z archives.
>>
>> (Actually another archive format would be fine if it is competitive.
>> I'm just looking to compress my .zips better.  I need a Python module
>> to extract members reasonably fast, but slow compression would be OK.)
>
> http://bugs.python.org/issue5689

[For lzma/xz compressed tar archives]

Thanks, but extraction of individual members from .tar.xz looks
inherently slow.  To locate the member, you need to decompress
the entire portion of the archive preceding the member.

-- 
Hallvard